鍥形劈裂法測定聚合物混凝土粘結(jié)強(qiáng)度
郭曉輝,張新樂,曹海,馮進(jìn)技
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(總參工程兵科研三所, 洛陽 471023)[摘要]防護(hù)工程的加固改造和快速搶修對混凝土材料的早期抗壓強(qiáng)度和粘結(jié)強(qiáng)度要求較高。為此,在普通混凝土配合比的基礎(chǔ)上,摻加不同摻量丙烯酸酯共聚乳液(NYS)聚合物,通過調(diào)整水灰比,得到早期抗壓強(qiáng)度高的NYS聚合物混凝土的配合比;采用鍥形劈裂拉伸試驗(yàn)裝置,對NYS聚合物混凝土與普通混凝土進(jìn)行粘結(jié)性能試驗(yàn),得到NYS聚合物混凝土粘結(jié)強(qiáng)度。結(jié)果表明:NYS聚合物混凝土早期抗壓強(qiáng)度和粘結(jié)強(qiáng)度均高于普通混凝土,NYS聚合物混凝土可以用于防護(hù)工程的快速加固和搶修。[關(guān)鍵詞]楔形劈裂法; NYS; 聚合物混凝土; 配合比; 粘結(jié)性能中圖分類號:TU755文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2013)21-0063-03Bond strength of NYS polymer modified concrete measured by wedge splitting methodGuo Xiaohui, Zhang Xinle, Cao Hai, Feng Jinji(The Third Engineer Scientific Research Institute of the Headquarters of the General Staff, Luoyang 471023, China)Abstract: Reinforcement, rebuild and rapid repair of protective projects need high early compressive strength concrete and high bond strength concrete. Different amount of NYS was mixed into normal concrete mixture through changing ratio of water and cement to obtain the NYS polymer modified concrete mixture with high early compressive strength. Bond strength of NYS polymer modified concrete and normal concrete was carried out by wedge splitting stretched device to achieve the bond strength of NYS polymer modified concrete. Results indicate that early compressive strength and bond strength of NYS polymer modified concrete are higher than those of normal concrete. The NYS polymer modified concrete can be used for reinforcement, rebuild and repair of proective projects.Keywords: wedge splitting method; NYS; polymer concrete; mixture; bond strength作者簡介:郭曉輝,碩士,副研究員,Email: gxh61489@163.com。參考文獻(xiàn)[1]林寶玉,吳紹章.混凝土工程新材料設(shè)計(jì)與施工[M].北京:中國水利水電出版社,1998.[2]趙軍,齊新華,楊長明.聚合物混凝土壓縮韌性試驗(yàn)研究[J].河南科學(xué),2005,23(4):549-551.[3]張勝強(qiáng),趙軍,鄭先杰.聚合物混凝土的抗拉性能試驗(yàn)研究[J].山西建筑,2001,27(2):37-40.[4]段暉,趙軍,李政文,等.聚合物對混凝土抗壓強(qiáng)度的影響[J].河南科學(xué),2004,22(6):809-811.[5]鐘世云,袁華.聚合物在混凝土中的應(yīng)用[M]:北京:化學(xué)工業(yè)出版社,2003.[6]黃從運(yùn),王服人.聚合物改性混凝土[J].房材與應(yīng)用,2002,30(5):25-26.
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